---May we leave the classroom now?
---No, you      . You       to leave until the bell rings.
A.mustn’t, are allowedB.don’t have to, are supposed
C.needn’t, aren’t allowedD.can’t, aren’t supposed
D

試題分析:句意:我們現(xiàn)在可以離開教室嗎?不,你們不能,直到下課鈴響了,才可以離開。can’t表示不能夠,用于回答may的提問,be supposed to do sth應該做某事,故選D
點評:情態(tài)動詞是中考的必考語言點。情態(tài)動詞表必要性時用must(必須)與don’t have to / needn’t(不必要);表推測時用must (肯定、一定)與 can’t/couldn’t (不可能);表請求和許可時can/may(可以、能夠)與can’t/mustn’t(禁止、不許)。
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